EP0857906B1 - Device for making crimped connections in piping elements - Google Patents

Device for making crimped connections in piping elements Download PDF

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Publication number
EP0857906B1
EP0857906B1 EP97118004A EP97118004A EP0857906B1 EP 0857906 B1 EP0857906 B1 EP 0857906B1 EP 97118004 A EP97118004 A EP 97118004A EP 97118004 A EP97118004 A EP 97118004A EP 0857906 B1 EP0857906 B1 EP 0857906B1
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EP
European Patent Office
Prior art keywords
press
compression sleeve
pipe
sleeve
pipe end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97118004A
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German (de)
French (fr)
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EP0857906A1 (en
Inventor
Gottfried Mair
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Individual
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Individual
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Filing date
Publication date
Priority claimed from DE29703551U external-priority patent/DE29703551U1/en
Application filed by Individual filed Critical Individual
Publication of EP0857906A1 publication Critical patent/EP0857906A1/en
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Publication of EP0857906B1 publication Critical patent/EP0857906B1/en
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/141—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside
    • F16L13/143—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside with a sealing element placed around the male part before crimping or rolling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/20—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members
    • F16L33/207—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose
    • F16L33/2071—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member
    • F16L33/2073—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member
    • F16L33/2076—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member by plastic deformation

Definitions

  • the invention relates to a device for clamping connection of Pipe elements according to the preamble of the claim 1.
  • Pipes made of metal and plastic are used in heating and sanitary facilities or composite materials used during installation the system with the required fittings and Fittingen must be connected pressure-tight.
  • a device with the features of the preamble of Claim 1 is known from US-A 4 226 446. Indeed there the compression sleeve has a radially inward edge directed flange projection, which in an annular groove of the Press fittings engages, thereby pressing sleeve and fitting before Pressed together with the pipe end to form a unit.
  • the invention has for its object a system available with the help of which the disadvantages mentioned can be safely avoided, so that ensured when pressing is that the compression sleeve is defined in its axially End position is on the pipe end and the jaws of the press tool attack at the specified point on the press sleeve.
  • the invention Compared to the previously used, made of smooth pipe sections existing compression sleeves, the invention has the essential advantage that narrowed the ferrule with its radially inward Edge that is conical or flanged radially inwards can form an investment shoulder that ensures that the press sleeve after placing it on the pipe end in its axial end position.
  • the compression sleeve has two circumferential beads, the axial distance corresponds to the width of the press tool. That way it stands an axially defined contact surface for the jaws of the press tool to disposal.
  • Another advantage is that the The beads embed an undesired drainage of the Prevent pipe material to the outside so that the ends the press sleeve does not expand conically towards the outside (to tulip).
  • a press fitting 10 is in the form of a Angle piece 12 shown, for example made of brass is and has two connecting pieces 14 with O-rings 16. On the two connecting pieces 14 each have a pipe end 18 are put on, that after postponement up to one Separating ring 20 to be pressed with the connecting piece 14.
  • the in essentially cylindrical press sleeve 22 consists of a plastically deformable material, for example stainless steel.
  • the compression sleeve 22 is narrowed at one end and has one for this purpose radially inwardly flanged edge 24, which after sliding the compression sleeve 22 onto the pipe end 18 according to FIG. 2 axially comes to a stop at this pipe end.
  • radially inwardly flanged edge 24 In the area of flanged edge 24 are two diametrical in the ferrule 22 Opposing visual inspection slots 26 cut the are axially open to the free end of the compression sleeve 22. So that's it possible after pushing the compression sleeve 22 onto the pipe end 18 determine the defined seat in the axial end position.
  • Figures 1 to 3 further show that the compression sleeve 22 two has circumferential beads 28, the axial distance a of the width b the clamping jaws 30 (FIG. 3) one in FIGS. 6 to 8 shown pressing tool 32 corresponds.
  • Figure 9 shows a variant of Figure 1, in which the edge 24 of the Press sleeve 22 is conically narrowed, which is easier to manufacture as a radial flare without the defined axial System at the end of the pipe is impaired.

Abstract

The connection has a pressure sleeve (22) which is slid over one pipe end and contains a pipe fitment. The pressure sleeve has a radially inward flanged edge placed axially onto the end (18) of the pipe, and at least one peripheral ridge (28) for positioning a pressing tool. The pressure sleeve has two peripheral ridges spaced axially apart by a distance corresponding to the width (b) of the pressing tool. At least one sight control slot is cut into the flanged rim and is axially open towards the free end of the pressure sleeve.

Description

Die Erfindung betrifft eine Vorrichtung zur Klemmverbindung von Rohrleitungselementen nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for clamping connection of Pipe elements according to the preamble of the claim 1.

In Heizungs- und Sanitäranlagen werden Rohre aus Metall, Kunststoff oder Verbundwerkstoffen verwendet, die bei der Installation der Anlage mit den jeweils benötigten Armaturen und Fittingen druckdicht verbunden werden müssen. Zu diesem Zweck dienen plastisch verformbare, zylindrische Preßhülsen, die im Verbindungsbereich auf das Rohrende aufgesetzt werden, wonach die Verpressung mit Hilfe eines Preßwerkzeugs erfolgt, dessen Backen die Preßhülse an mehreren Stellen ringförmig in das Rohrende eindrücken, so daß eine axial feste, kraft- und formschlüssige Verbindung zustande kommt.Pipes made of metal and plastic are used in heating and sanitary facilities or composite materials used during installation the system with the required fittings and Fittingen must be connected pressure-tight. To this end serve plastically deformable, cylindrical press sleeves, which in Connection area to be placed on the pipe end, after which the pressing is carried out with the help of a press tool Bake the ferrule in several places in a ring in the pipe end press in so that an axially fixed, non-positive and positive Connection comes about.

Die Verwendung einer zylindrischen Preßhülse hat sich vielfach als nachteilig herausgestellt, da diese insbesondere bei vertikal verlegten Rohren vor und während der Verpressung verrutschen kann, so daß vor allem bei Überkopfarbeiten fehlerhafte oder sogar unbrauchbare Preßstellen erzeugt werden, die manchmal nicht sofort erkannt werden, so daß im anschließenden Betrieb Undichtigkeiten auftreten. Hinzu kommt, daß nach dem Einschieben des Preßfittings in das Rohrende an schwierig zugänglichen Stellen eine Sichtkontrolle unmöglich ist, um festzustellen, ob das Rohrende mit der Preßhülse axial bis zum Anschlag des Preßfittings vorgeschoben wurde. Nicht zuletzt wird durch die zylindrische Preßhülse keinerlei Führung zur Verfügung gestellt, die eine axial definierte Anlage der Backen des Preßwerkzeugs zum Preßfitting garantiert. The use of a cylindrical press sleeve has increased many times found to be disadvantageous, as this is particularly the case with vertical installed pipes slip before and during pressing can, so that faulty or even useless press points are created, which sometimes cannot be recognized immediately, so that in subsequent operation Leaks occur. Add to that that after insertion of the press fitting in the pipe end at difficult to access Make a visual inspection is impossible to determine if the pipe end with the compression sleeve axially to the stop of Press fittings was advanced. Last but not least, the cylindrical press sleeve provided no guidance, which is an axially defined system of the jaws of the press tool guaranteed for press fitting.

Eine Vorrichtung mit den Merkmalen des Oberbegriffs des Patentanspruchs 1 ist aus der US-A 4 226 446 bekannt. Allerdings hat dort die Preßhülse an einem Rand einen radial nach innen gerichteten Flanschvorsprung, der in eine Ringnut des Preßfittings eingreift, wodurch Preßhülse und Fitting vor dem Verpressen mit dem Rohrende zu einer Einheit verbunden werden.A device with the features of the preamble of Claim 1 is known from US-A 4 226 446. Indeed there the compression sleeve has a radially inward edge directed flange projection, which in an annular groove of the Press fittings engages, thereby pressing sleeve and fitting before Pressed together with the pipe end to form a unit.

Der Erfindung liegt die Aufgabe zugrunde, ein System zur Verfügung zu stellen, mit dessen Hilfe die genannten Nachteile sicher vermieden werden können, so daß beim Verpressen sichergestellt ist, daß sich die Preßhülse in ihrer axial definierten Endstellung auf dem Rohrende befindet und die Backen des Preßwerkzeugs an der vorgegebenen Stelle der Preßhülse angreifen.The invention has for its object a system available with the help of which the disadvantages mentioned can be safely avoided, so that ensured when pressing is that the compression sleeve is defined in its axially End position is on the pipe end and the jaws of the press tool attack at the specified point on the press sleeve.

Bei einer Vorrichtung zur Klemmverbindung der eingangs umrissenen Bauart wird diese Aufgabe erfindungsgemäß durch die Merkmale im kennzeichnenden Teil des Patentanspruchs 1 gelöst. Vorteilhafte Weiterbildungen sind Gegenstand der abhängigen Ansprüche.In the case of a device for the clamping connection of the ones outlined at the beginning This task is inventively by the Features solved in the characterizing part of claim 1. Advantageous further developments are the subject of the dependent Expectations.

Gegenüber den bisher verwendeten, aus glatten Rohrabschnitten bestehenden Preßhülsen hat die Erfindung den wesentlichen Vorteil, das die Preßhülse mit ihrem radial nach innen verengten Rand, der konisch ausgebildet oder radial nach innen umgebördelt sein kann, eine Anlageschulter bildet, die sicherstellt, daß sich die Preßhülse nach dem Aufsetzen auf das Rohrende in ihrer axialen Endstellung befindet.Compared to the previously used, made of smooth pipe sections existing compression sleeves, the invention has the essential advantage that narrowed the ferrule with its radially inward Edge that is conical or flanged radially inwards can form an investment shoulder that ensures that the press sleeve after placing it on the pipe end in its axial end position.

Durch den als Fenster wirkenden Sichtkontrollschlitz kann nach dem Aufsetzen der Preßhülse auf das Rohrende visuell sicher festgestellt werden, ob sich die Preßhülse in ihrer axialen Endanschlagstellung auf dem Rohrende befindet. Diese Sichtkontrolle kann auch nach dem Einschieben des Fittings oder der Rohrarmatur wiederholt werden, so daß anschließend eine fehlerfreie Verpressung gewährleistet ist. Through the visual inspection slot acting as a window, after the placement of the compression sleeve on the pipe end is visually safe be determined whether the press sleeve in its axial End stop position is on the pipe end. This visual inspection can also be inserted after the fitting or Pipe fitting must be repeated, so that subsequently an error-free Compression is guaranteed.

Eine wesentliche Verbesserung kann dadurch erreicht werden, daß die Preßhülse zwei umlaufende Sicken hat, deren axialer Abstand der Breite des Preßwerkzeugs entspricht. Auf diese Weise steht eine axial definierte Anlagefläche für die Backen des Preßwerkzeugs zur Verfügung. Ein weiterer Vorteil besteht darin, daß die Sicken biem Verpressen ein unerwünschtes Abfließen des Rohrmaterials nach außen weitgehend verhindern, so daß die Enden der Preßhülse sich nach außen hin nicht konisch erweitern (auftulpen) können.A significant improvement can be achieved in that the compression sleeve has two circumferential beads, the axial distance corresponds to the width of the press tool. That way it stands an axially defined contact surface for the jaws of the press tool to disposal. Another advantage is that the The beads embed an undesired drainage of the Prevent pipe material to the outside so that the ends the press sleeve does not expand conically towards the outside (to tulip).

Die Erfindung ist nachstehend an Ausführungsbeispielen erläutert, die in der Zeichnung dargestellt sind. Es zeigen:

  • Figur 1 einen Längsschnitt durch eine Preßhülse,
  • Figur 2 die Darstellung der auf ein Rohrende aufgeschobenen Preßhülse der Figur 1,
  • Figur 3 eine Schnittdarstellung des Rohrendes nach dem Einschieben eines Preßfittings und während der Verpressung durch eine Preßzange.
  • Figur 4 die Ansicht eines Beispiels eines Preßfittings mit zwei angedeuteten Rohrenden, die mit dem Preßfitting zu verbinden sind,
  • Figur 5 die Ansicht eines Preßfittings vor dem Einsetzen in ein Rohrende, auf das die Preßhülse aufgeschoben ist,
  • Figur 6 die Ansicht eines geöffneten Preßwerkzeugs, zwischen dessen Backen das entsprechend Figur 3 vorbereitete Rohrende eingesetzt wird,
  • Figur 7 das Preßwerkzeugs während des Preßvorgangs,
  • Figur 8 das Preßwerkzeug mit geöffneten Preßbacken beim Herausnehmen des verpreßten Rohrendes,
  • Figur 9 eine Variante der Figur 1 und
  • Figur 10 die Teildarstellung einer weiteren Variante.
    • The invention is explained below using exemplary embodiments which are illustrated in the drawing. Show it:
  • FIG. 1 shows a longitudinal section through a press sleeve,
  • FIG. 2 shows the press sleeve of FIG. 1 pushed onto a pipe end,
  • Figure 3 is a sectional view of the pipe end after inserting a press fitting and during the pressing by a crimping tool.
  • FIG. 4 shows the view of an example of a press fitting with two indicated pipe ends which are to be connected to the press fitting,
  • FIG. 5 shows the view of a press fitting before it is inserted into a pipe end onto which the press sleeve is pushed,
  • FIG. 6 shows the view of an open pressing tool, between the jaws of which the pipe end prepared in accordance with FIG. 3 is inserted,
  • FIG. 7 the pressing tool during the pressing process,
  • FIG. 8 the pressing tool with open pressing jaws when removing the pressed pipe end,
  • Figure 9 shows a variant of Figure 1 and
  • Figure 10 shows the partial representation of a further variant.

    • Am Beispiel der Figur 4 ist ein Preßfitting 10 in Form eines Winkelstücks 12 gezeigt, das beispielsweise aus Messing hergestellt ist und zwei Anschlußstutzen 14 mit O-Ringen 16 aufweist. Auf die beiden Anschlußstutzen 14 soll jeweils ein Rohrende 18 aufgesetzt werden, das nach dem Aufschieben bis zu einem Trennring 20 mit dem Anschlußstutzen 14 verpreßt werden soll.4, a press fitting 10 is in the form of a Angle piece 12 shown, for example made of brass is and has two connecting pieces 14 with O-rings 16. On the two connecting pieces 14 each have a pipe end 18 are put on, that after postponement up to one Separating ring 20 to be pressed with the connecting piece 14.

    Für die Klemmverbindung des Rohrendes 18 auf dem Fitting 10 dient eine gemäß der Erfindung ausgebildete Preßhülse 22, die in einem ersten Beispiel in Figur 1 gezeigt ist. Die im wesentlichen zylindrisch ausgebildete Preßhülse 22 besteht aus einem plastisch verformbaren Material, beispielsweise Edelstahl. An einem Ende ist die Preßhülse 22 verengt und hat hierzu einen radial nach innen umgebördelten Rand 24, der nach dem Aufschieben der Preßhülse 22 auf das Rohrende 18 gemäß Figur 2 axial an diesem Rohrende zum Anschlag kommt. Im Bereich des umgebördelten Randes 24 sind in die Preßhülse 22 zwei diametral gegenüberliegende Sichtkontrollschlitze 26 eingeschnitten, die zum freien Ende der Preßhülse 22 axial offen sind. Damit ist es möglich, nach dem Aufschieben der Preßhülse 22 auf das Rohrende 18 den definierten Sitz in der axialen Endstellung festzustellen.For the clamp connection of the pipe end 18 on the fitting 10 serves a press sleeve 22 designed according to the invention, which in a first example is shown in FIG. 1. The in essentially cylindrical press sleeve 22 consists of a plastically deformable material, for example stainless steel. The compression sleeve 22 is narrowed at one end and has one for this purpose radially inwardly flanged edge 24, which after sliding the compression sleeve 22 onto the pipe end 18 according to FIG. 2 axially comes to a stop at this pipe end. In the area of flanged edge 24 are two diametrical in the ferrule 22 Opposing visual inspection slots 26 cut the are axially open to the free end of the compression sleeve 22. So that's it possible after pushing the compression sleeve 22 onto the pipe end 18 determine the defined seat in the axial end position.

    Die Figuren 1 bis 3 zeigen weiter, daß die Preßhülse 22 zwei umlaufende Sicken 28 hat, deren axialer Abstand a der Breite b der Klemmbacken 30 (Figur 3) eines in den Figuren 6 bis 8 gezeigten Preßwerkzeugs 32 entspricht.Figures 1 to 3 further show that the compression sleeve 22 two has circumferential beads 28, the axial distance a of the width b the clamping jaws 30 (FIG. 3) one in FIGS. 6 to 8 shown pressing tool 32 corresponds.

    Nachdem die Preßhülse 22 gemäß Figur 2 auf das Rohrende 18 bis zum Anschlag durch den umgebördelten Rand 24 aufgeschoben worden ist, wird gemäß Figur 3 das Fitting 10 in das Rohrende 18 eingesetzt. Dabei ist darauf zu achten, daß die O-Ringe 16 in ihrem Sitz bleiben und nicht verletzt werden. Das Fitting 10 wird bis zum Anschlag an dem Trennring 20 in das Rohrende 18 geschoben. Durch die beiden Sichtkontrollschlitze 26 ist zu erkennen, ob das Rohrende 18 bis zu dem Trennring 20 aufgeschoben ist.After the press sleeve 22 according to Figure 2 on the pipe end 18 to been pushed to the stop by the flanged edge 24 3, the fitting 10 is inserted into the pipe end 18 used. Make sure that the O-rings 16 in stay in their seat and not get hurt. The fitting 10 is in the pipe end 18 up to the stop on the separating ring 20 pushed. Through the two visual inspection slots 26 is closed recognize whether the pipe end 18 is pushed up to the separating ring 20 is.

    Anschließend wird entsprechend Figur 6 das auf diese Weise vorbereitete Rohrende 18 zwischen die geöffneten Klemmbacken 30 des Preßwerkzeugs 32 gelegt, wobei die beiden umlaufenden Sicken 28 eine definierte Führung und Anlage für die Klemmbacken 30 bilden. Danach wird gemäß den Figuren 3 und 7 die Verpressung durchgeführt, wobei die beiden Klemmbacken 30 geschlossen werden. Die an der Innenseite der Klemmbacken 30 ausgebildeten Ringwülste 34 drücken dabei die Preßhülse 22 radial nach innen gegen das Fitting 10, wodurch eine druckdichte und axial unverrückbare Verbindung hergestellt wird.This is then done in accordance with FIG. 6 prepared pipe end 18 between the open jaws 30 of the pressing tool 32, the two circumferential beads 28 a defined guide and system for the clamping jaws 30 form. Thereafter, according to Figures 3 and 7, the pressing carried out, the two jaws 30 closed become. Those formed on the inside of the jaws 30 Ring beads 34 press the compression sleeve 22 radially inwards against the fitting 10, creating a pressure tight and axial immovable connection is established.

    Anschließend wird das Preßwerkzeug 32 geöffnet, so daß gemäß Figur 8 das Rohrende mit dem fixierten Fitting 10 freigegeben wird.Then the pressing tool 32 is opened so that according to Figure 8 released the pipe end with the fixed fitting 10 becomes.

    Figur 9 zeigt eine Variante der Figur 1, bei der der Rand 24 der Preßhülse 22 konisch verengt ist, was einfacher herzustellen ist als eine radiale Umbördelung, ohne daß die definierte axiale Anlage am Rohrende beeinträchtigt wird.Figure 9 shows a variant of Figure 1, in which the edge 24 of the Press sleeve 22 is conically narrowed, which is easier to manufacture as a radial flare without the defined axial System at the end of the pipe is impaired.

    Im Ausführungsbeispiel der Figur 10 ist das Ende der Preßhülse 22 nur auf einer kurzen Länge des Randes 24 radial nach innen konisch verengt. Der eingezeichnete Winkel α liegt in der Größenordnung von 45°.In the embodiment of Figure 10 is the end of the press sleeve 22 radially inward only over a short length of the edge 24 conically narrowed. The drawn angle α is in the Magnitude of 45 °.

    Claims (3)

    1. Device for making crimped connections of piping elements comprising a compression sleeve (22) suitable for plastic deformation, which may be slipped on a tube end (18) into which a pipe fitting, a press fitting (10) or the like is inserted, said compression sleeve having at least one circumferential bead (28) serving as precise abutting element for a press tool (32), characterized in that said compression sleeve (22) has a radially inward contracted edge (24) adapted to axially contact said tube end (18), and that at least one slot (26) for visual examination is cut in said edge (24), said slot, at the free end of the compression sleeve (22), having an axially open end.
    2. Device according to claim 1 wherein said edge (24) is radially flanged to the inside.
    3. Device according to claim 1 or 2 wherein said compression sleeve (22) has two circumferential beads (22) having an axial distance (a) for the precise positioning of the press tool (32).
    EP97118004A 1997-02-07 1997-10-17 Device for making crimped connections in piping elements Expired - Lifetime EP0857906B1 (en)

    Applications Claiming Priority (4)

    Application Number Priority Date Filing Date Title
    DE29701990 1997-02-07
    DE29701990U 1997-02-07
    DE29703551U 1997-02-27
    DE29703551U DE29703551U1 (en) 1997-02-07 1997-02-27 Device for the clamping connection of pipe elements

    Publications (2)

    Publication Number Publication Date
    EP0857906A1 EP0857906A1 (en) 1998-08-12
    EP0857906B1 true EP0857906B1 (en) 2003-01-08

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP97118004A Expired - Lifetime EP0857906B1 (en) 1997-02-07 1997-10-17 Device for making crimped connections in piping elements

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    AT (1) ATE230835T1 (en)

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10327503A1 (en) * 2003-06-17 2005-01-05 VETEC GmbH Verbindungstechnologie für Versorgungssysteme Combination of a press fitting with a pressing tool, grouting fitting and compression sleeve
    DE102017210844A1 (en) * 2017-06-27 2018-12-27 Fränkische Rohrwerke Gebr. Kirchner Gmbh & Co. Kg compression sleeve

    Family Cites Families (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US4226446A (en) * 1978-11-20 1980-10-07 Dana Corporation Hose coupling
    US4407532A (en) * 1981-01-26 1983-10-04 Dana Corporation Hose end fitting
    US4923226A (en) * 1987-06-23 1990-05-08 Proprietary Technology, Inc. Apparatus for attaching a hose to a fitting

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    EP0857906A1 (en) 1998-08-12
    ATE230835T1 (en) 2003-01-15

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